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Article: Determination of pesticides in drinking water by micellar electrokinetic capillary chromatography

TitleDetermination of pesticides in drinking water by micellar electrokinetic capillary chromatography
Authors
Keywordsβ-Cyclodextrin
Field-amplified sample stacking
Pesticides
Water analysis
Issue Date2001
PublisherWiley - V C H Verlag GmbH & Co KGaA.
Citation
Electrophoresis, 2001, v. 22 n. 11, p. 2260-2269 How to Cite?
AbstractA new analytical procedure using a two-step sample preconcentration (solid-phase extraction (SPE) and field-amplified sample stacking) prior to separation by micellar electrokinetic capillary chromatography was developed for the determination of 14 pesticides such as aldicarb, carbofuran, isoproturon, chlorotoluron, metolachlor, mecoprop, dichlorprop, MCPA, 2,4-D, methoxychlor, TDE, DDT, dieldrin, and DDE in drinking water. Good recoveries of pesticides were obtained using SPE with sample pH adjusted to 2-3. Field-amplified sample stacking was found to give enrichment factors up to 30-fold preconcentration of various pesticides under reversed polarity at -2 kV for 50 s. The optimized background electrolyte (BGE) consisted of 50 mM sodium dodecyl sulfate (SDS), 10 mM borate buffer, 15 mM β-cyclodextrin (β-CD), and 22% acetonitrile at pH 9.6, running was under 25 kV and detection at 202 nm. Good linearity was obtained for all pesticides with detection limits down to 0.04-0.46 ng/mL and a working range of 0.1-40 ng/mL. The repeatabilities of migration time and peak area were satisfactory with relative standard deviations (RSDs) between 0.66 and 13.6% and 4.1 and 28%, respectively. All pesticides except dieldrin were found to be detected at concentrations at least tenfold lower than the World Health Organization (WHO) guideline values. The analytical procedure developed offers an economic method for fast screening of multiple pesticide residues in drinking water for health protection. It had been applied to determine carbofuran and MCPA in agricultural run-off water samples, giving satisfactory repeatabilities of 10 and 12%, respectively, with n=5 for the determination of pesticides in contaminated water samples.
Persistent Identifierhttp://hdl.handle.net/10722/69744
ISSN
2015 Impact Factor: 2.482
2015 SCImago Journal Rankings: 0.896
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFung, YSen_HK
dc.contributor.authorMak, JLLen_HK
dc.date.accessioned2010-09-06T06:16:27Z-
dc.date.available2010-09-06T06:16:27Z-
dc.date.issued2001en_HK
dc.identifier.citationElectrophoresis, 2001, v. 22 n. 11, p. 2260-2269en_HK
dc.identifier.issn0173-0835en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69744-
dc.description.abstractA new analytical procedure using a two-step sample preconcentration (solid-phase extraction (SPE) and field-amplified sample stacking) prior to separation by micellar electrokinetic capillary chromatography was developed for the determination of 14 pesticides such as aldicarb, carbofuran, isoproturon, chlorotoluron, metolachlor, mecoprop, dichlorprop, MCPA, 2,4-D, methoxychlor, TDE, DDT, dieldrin, and DDE in drinking water. Good recoveries of pesticides were obtained using SPE with sample pH adjusted to 2-3. Field-amplified sample stacking was found to give enrichment factors up to 30-fold preconcentration of various pesticides under reversed polarity at -2 kV for 50 s. The optimized background electrolyte (BGE) consisted of 50 mM sodium dodecyl sulfate (SDS), 10 mM borate buffer, 15 mM β-cyclodextrin (β-CD), and 22% acetonitrile at pH 9.6, running was under 25 kV and detection at 202 nm. Good linearity was obtained for all pesticides with detection limits down to 0.04-0.46 ng/mL and a working range of 0.1-40 ng/mL. The repeatabilities of migration time and peak area were satisfactory with relative standard deviations (RSDs) between 0.66 and 13.6% and 4.1 and 28%, respectively. All pesticides except dieldrin were found to be detected at concentrations at least tenfold lower than the World Health Organization (WHO) guideline values. The analytical procedure developed offers an economic method for fast screening of multiple pesticide residues in drinking water for health protection. It had been applied to determine carbofuran and MCPA in agricultural run-off water samples, giving satisfactory repeatabilities of 10 and 12%, respectively, with n=5 for the determination of pesticides in contaminated water samples.en_HK
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA.en_HK
dc.relation.ispartofElectrophoresisen_HK
dc.subjectβ-Cyclodextrinen_HK
dc.subjectField-amplified sample stackingen_HK
dc.subjectPesticidesen_HK
dc.subjectWater analysisen_HK
dc.titleDetermination of pesticides in drinking water by micellar electrokinetic capillary chromatographyen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0173-0835&volume=22&spage=2260&epage=2269&date=2001&atitle=Determination+of+pesticides+in+drinking+water+by+micellar+electrokinetic+capillary+chromatographyen_HK
dc.identifier.emailFung, YS:ysfung@hku.hken_HK
dc.identifier.authorityFung, YS=rp00697en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/1522-2683(20017)22:11<2260::AID-ELPS2260>3.0.CO;2-Men_HK
dc.identifier.pmid11504061-
dc.identifier.scopuseid_2-s2.0-0034919433en_HK
dc.identifier.hkuros68491en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034919433&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume22en_HK
dc.identifier.issue11en_HK
dc.identifier.spage2260en_HK
dc.identifier.epage2269en_HK
dc.identifier.isiWOS:000170175800020-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridFung, YS=13309754700en_HK
dc.identifier.scopusauthoridMak, JLL=7103323434en_HK

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